Recurring BIS Section 232 steel/aluminum inclusion window for 2026-05; dates are rule-based projections and exact request dates must follow the official posting.

A Section 232 measure is a U.S. trade action based on a finding that certain imports may threaten national security. For steel and aluminum, an “inclusion window” generally refers to a period when an interested party may request that an additional steel or aluminum product, often a derivative product, be added to the covered scope. The agency’s official posting controls the process; a rule-based projection is not a confirmed request period.

This can affect importers, manufacturers, distributors, and other businesses bringing covered metal products into the United States. The practical impact depends on the product’s technical characteristics, Harmonized Tariff Schedule of the United States (HTSUS) classification, country-specific rules, exclusions, quota arrangements, and the final official scope. An inclusion request or window does not by itself prove that every similar product is subject to an additional duty or other measure.

What to check

• Check the official agency notice for the confirmed opening and closing dates, eligibility rules, submission method, and required evidence.
• Verify the product’s HTSUS classification and technical description with a qualified customs professional; do not rely on the product name alone.
• Compare the product’s specifications, composition, dimensions, and manufacturing process with the official Section 232 scope and any derivative-product language.
• Check whether an exclusion, quota, tariff-rate quota, country arrangement, or other special rule applies to the product and origin.
• Review entry instructions and customs records so the correct reporting, documentation, and payment treatment is used if the product is covered.